Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Selective control of jointed goatgrass (Aegilops cylindrica) with imazamox in herbicide-resistant wheat.

Abstract

Imazamox was applied to an imidazolinone herbicide-resistant (IMI) mutant of winter wheat cv. Fidel in Oregon and Washington, USA. A. cylindrica control from spring post-emergence application of imazamox ranged from 61 to 97% when applied at 36 g a.i./ha. Spring applications controlled A. cylindrica better at low application rates (below 71 g a.i./ha) than autumn applications. Negligible crop injury from imazamox treatment was observed at 36 g a.i./ha. Wheat yield was increased by 19 to 41% by imazamox treatment in 3 of 4 experiments. Percent dockage resulting from A. cylindrica spikelet contamination of harvested wheat grain was eliminated by imazamox treatment. Introduction of the IMI trait into commercial wheat cultivars could provide an effective method for selective control of A. cylindrica in winter wheat.